This room's appearance changes significantly between the original Metroid and the remake Zero Mission. In both games, this room leads directly to the Wave Beam. As that is an optional item, it is possible to skip visiting this room and still complete the game.
In Metroid, the room is visually identical to the "Hi-Jump access corridor" and "Screw Attack corridor" as it consists of large lava pool, over which three midair metal platforms are suspended. Sovas and Dragons in the room pose a challenge to navigation, due to the latter's projectiles from below. If Samus is knocked into the lava, she has limited means to escape from it. On the other side of the room is a Red Hatch leading into the Wave Beam's chamber. Since the Ice Beam is necessary for Tourian, and the Ice and Wave Beams cannot stack,
In Zero Mission, the room's appearance has been completely changed. It is now set in a corridor of glass bubbles. While the lava is retained, it is below the surface of the floor and therefore cannot harm Samus. It extends into the Wave Beam's chamber, where it is still unreachable. What appear to be more glass bubbles or some sort of membrane can be seen extending into the background.
In the center of the room are two columns of glass bubbles, which are actually Bomb Blocks. Between the columns is a single Baristute, which is released as soon as the rightmost Bomb Block column is destroyed. Laying a Bomb against one will destroy the rest in a chain reaction. After defeating the Baristute and destroying the second wall, Samus can continue on to the Wave Beam. On returning to this room, the Baristute and columns respawn. Samus can shoot the creature through the wall using the Wave Beam to kill it much easier, then remove the columns again and leave.
- 143 wave beam (pg. 59)
- "A large creature protects the path to the Wave Beam. Use a bomb to destroy the wall between you and the creature, then jump over the beast or roll under it as it jumps. Destroy the next wall and continue left to the upgrade."
- 144 THE WAVE BEAM ADVANTAGE (pg. 60)
- "Returning from the room that held the Wave Beam, you'll see the large hopping creature waiting for you on the other side of the wall. Before you break the wall, use your newly acquired weapon to fire through the barrier and defeat the creature without getting hurt."